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| Building a milling machine |
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| NormanV:
The table slides on a 4" wide x 1/2" thick vertical runner. When it is set to height I will lock it with screws on the gib strip so I don't think that there will be any rocking. Fine height adjustment will be done with the dovetail slide on the head. More of a concern is forward sag, at present there is some movement but I am hoping to improve on that by adjusting the shims in the box slide. I will do that after I receive the Acme leadscrew as both jobs will require dismantling it to fit them and I don't want to have to do it twice. |
| NormanV:
The lead-screw for elevating the table is fitted. I connected it up temporarily and found that it operates very smoothly under power but when I tried to reverse it the motor got a bit smoky. Fortunately I turned it off quickly and now that it has cooled down it is still working, phew! Since that happened I have bought a reversing switch which I still have to sort out the wiring for. When the motor was running the wooden cabinet resonated, it was a bearable noise but I will try to make a resilient mount for the motor to try to quieten it. The table moves quite slowly under power so setting it accurately in position should be quite easy, I am also able to hand crank it for fine setting. The screw is fixed and the nut rotates around it. The height of the head can also adjusted precisely. I have obtained the main spindle and bearings and fitted them. It was an interesting piece of machining for the head casting. Firstly I bored it with it mounted on the cross-slide and the made a mandrel and turned the bearing recesses with it mounted between centres. The bearings are taper-roller, I also fitted oils seals top and bottom. |
| NormanV:
I am getting quite excited by my milling machine. From the beginning I have had doubts about the practicality of what I am trying to do. But, I was looking at it today and feel more confident that I am going to produce a machine that will be capable of producing accurate work. Any comments on what I have done so far? |
| Arbalist:
Looking good so far Norman. That looks like about a 1hp motor so that should be fine. What colour are you going to paint it once it's finished! |
| superc:
That's very impressive to me. :thumbup: |
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